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| author | Eric Nelson <eric.nelson@boundarydevices.com> | 2012-01-31 10:52:07 -0700 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2012-02-12 15:18:29 -0500 |
| commit | c1173bd0754aa55bc52d874d5490c0c892a56ebf (patch) | |
| tree | 71d8705c113e9cd895d633ec54946e014532b2d0 /common/cmd_sf.c | |
| parent | 8b463dab933f3bb1e4ec703a9e3cbfca2f031334 (diff) | |
| download | u-boot-imx-c1173bd0754aa55bc52d874d5490c0c892a56ebf.zip u-boot-imx-c1173bd0754aa55bc52d874d5490c0c892a56ebf.tar.gz u-boot-imx-c1173bd0754aa55bc52d874d5490c0c892a56ebf.tar.bz2 | |
sf command: allow default bus and chip selects
This patch allows a board configuration file to provide default bus
and chip-selects for SPI flash so that first argument to the 'sf' command
is optional.
On boards that use the mxc_spi driver and a GPIO for chip select, this allows
a much simpler command line:
U-Boot> sf probe
instead of
U-Boot> sf probe 0x5300
Tested-by: Jason Liu <jason.hui@linaro.org>
Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'common/cmd_sf.c')
| -rw-r--r-- | common/cmd_sf.c | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/common/cmd_sf.c b/common/cmd_sf.c index 612fd18..98e4162 100644 --- a/common/cmd_sf.c +++ b/common/cmd_sf.c @@ -17,6 +17,12 @@ #ifndef CONFIG_SF_DEFAULT_MODE # define CONFIG_SF_DEFAULT_MODE SPI_MODE_3 #endif +#ifndef CONFIG_SF_DEFAULT_CS +# define CONFIG_SF_DEFAULT_CS 0 +#endif +#ifndef CONFIG_SF_DEFAULT_BUS +# define CONFIG_SF_DEFAULT_BUS 0 +#endif static struct spi_flash *flash; @@ -63,27 +69,26 @@ static int sf_parse_len_arg(char *arg, ulong *len) static int do_spi_flash_probe(int argc, char * const argv[]) { - unsigned int bus = 0; - unsigned int cs; + unsigned int bus = CONFIG_SF_DEFAULT_BUS; + unsigned int cs = CONFIG_SF_DEFAULT_CS; unsigned int speed = CONFIG_SF_DEFAULT_SPEED; unsigned int mode = CONFIG_SF_DEFAULT_MODE; char *endp; struct spi_flash *new; - if (argc < 2) - return -1; - - cs = simple_strtoul(argv[1], &endp, 0); - if (*argv[1] == 0 || (*endp != 0 && *endp != ':')) - return -1; - if (*endp == ':') { - if (endp[1] == 0) - return -1; - - bus = cs; - cs = simple_strtoul(endp + 1, &endp, 0); - if (*endp != 0) + if (argc >= 2) { + cs = simple_strtoul(argv[1], &endp, 0); + if (*argv[1] == 0 || (*endp != 0 && *endp != ':')) return -1; + if (*endp == ':') { + if (endp[1] == 0) + return -1; + + bus = cs; + cs = simple_strtoul(endp + 1, &endp, 0); + if (*endp != 0) + return -1; + } } if (argc >= 3) { @@ -299,7 +304,7 @@ usage: U_BOOT_CMD( sf, 5, 1, do_spi_flash, "SPI flash sub-system", - "probe [bus:]cs [hz] [mode] - init flash device on given SPI bus\n" + "probe [[bus:]cs] [hz] [mode] - init flash device on given SPI bus\n" " and chip select\n" "sf read addr offset len - read `len' bytes starting at\n" " `offset' to memory at `addr'\n" |